image overlap message for exposure 2 of trigger 1061284
uvot_overlap.pl vrs. 2010-12-20b fem started at 210724d11h09m27s948252usUT
The observation of trigger 1061284 started 2021-07-23T14:51:50.3
Examining file ./1061284_g339_uvot_sky_image.fits
The exposure ID is 648744710
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (121.7195,-32.8811) with a roll angle of 1.8
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (121.7260,-32.8890) with a radius of 3.000 arc min
This is 0.579 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (121.7212,-32.8857) with a radius of 0.033 arc min
This is 0.291 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1061284
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210724d11h09m51s171336usUT
Observation start time is 2021-07-23T14:51:50.3
Examining file ./1061284_g339_uvot_catalog_image.fits
The exposure ID is 648744710
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 30 detected source(s) for 1061284_g339
Aspect correction adds -0.00010 degrees (-0.025 sec of time = -0.32 arc sec) to RA
Aspect correction adds 0.00121 degrees ( 4.34 arcsec) to Dec
Total aspect correction is 4.35 arcsec
Star catalogs centered at 121.7235 , -32.8859 with radius 2.73 arc min.
n_usno: 474 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 26 matched entries is 0.610" for 1061284_g339
Mean and std. dev of mag. difference (MAG_DELTA) are 1.259 and 0.568 for 1061284_g339
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 1061284_g339.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=121.7260 (08:06:54.24) DEC=-32.8890 (-32:53:20.4)
XRT distances are from RA=121.7212 (08:06:53.08) DEC=-32.8857 (-32:53:08.5)
-----------------
Entry 10 in the list of sources is a candidate afterglow for 1061284_g339 with genie
ra=121.71222 (08:06:50.93) dec=-32.89825 (-32:53:53.7) +/- 0.6" mag=15.05+/-0.14
dist=52.7 REFID=27 major=1.3 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 53.3 arc sec from the BAT position.
Found 8 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7127 -32.8936 16.8 -1 USNO-B1 19.30 17.41 18.25
121.7146 -32.8982 7.2 -1 USNO-B1 20.53 17.79 19.01
121.7117 -32.8978 2.3 -1 USNO-B1 13.66 11.38 12.39 *
121.7110 -32.8979 3.9 -1 USNO-B1 13.86 11.20 12.38 *
121.7135 -32.9008 9.9 -1 USNO-B1 19.83 18.44 19.05
121.7096 -32.8991 8.6 -1 USNO-B1 16.86 99.99 99.99
121.7089 -32.8999 11.7 -1 USNO-B1 19.11 17.72 18.34
121.7079 -32.9010 16.5 -1 USNO-B1 19.70 18.13 18.83
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 15 in the list of sources is a candidate afterglow for 1061284_g339 with genie
ra=121.70786 (08:06:49.89) dec=-32.87570 (-32:52:32.5) +/- 0.9" mag=19.46+/-0.24
dist=54.0 REFID=11 major=0.9 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 72.8 arc sec from the BAT position.
Found 4 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7138 -32.8772 18.7 -1 USNO-B1 16.02 14.91 15.41
121.7097 -32.8753 5.6 -1 USNO-B1 19.10 17.20 18.04
121.7082 -32.8750 2.8 -1 USNO-B1 18.89 15.41 16.96 *
121.7080 -32.8751 2.3 -1 USNO-B1 17.80 15.54 16.55 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 17 in the list of sources is a candidate afterglow for 1061284_g339 with genie
ra=121.73766 (08:06:57.04) dec=-32.89708 (-32:53:49.5) +/- 0.6" mag=17.32+/-0.15
dist=64.5 REFID=26 major=1.1 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 45.7 arc sec from the BAT position.
This source is near the edge of image (0.949)
Found 9 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7371 -32.8968 2.1 -1 USNO-B1 16.57 15.30 15.87 *
121.7336 -32.8995 15.0 -1 USNO-B1 20.29 19.40 19.80
121.7414 -32.8940 15.7 -1 USNO-B1 20.31 18.89 19.52
121.7417 -32.8967 12.1 -1 USNO-B1 20.09 17.52 18.66
121.7418 -32.8966 12.7 -1 USNO-B1 19.10 17.55 18.24
121.7407 -32.8988 11.0 -1 USNO-B1 19.96 18.44 19.11
121.7404 -32.8991 11.0 -1 USNO-B1 99.99 17.34 99.99
121.7401 -32.9005 14.3 -1 USNO-B1 19.59 17.71 18.55
121.7435 -32.8996 19.7 -1 USNO-B1 21.05 19.30 20.08
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1061284_g339 with genie
ra=121.73662 (08:06:56.79) dec=-32.86803 (-32:52:04.9) +/- 0.6" mag=17.69+/-0.15
dist=78.9 REFID=3 major=1.2 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 82.0 arc sec from the BAT position.
Found 10 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7304 -32.8691 19.1 -1 USNO-B1 20.63 19.06 19.76
121.7363 -32.8716 12.9 -1 USNO-B1 17.45 15.86 16.57
121.7360 -32.8693 4.7 -1 USNO-B1 18.77 17.61 18.13
121.7363 -32.8691 3.8 -1 USNO-B1 18.19 16.09 17.03
121.7402 -32.8711 15.5 -1 USNO-B1 15.54 14.57 15.00
121.7360 -32.8683 2.0 -1 USNO-B1 16.72 14.71 15.61 *
121.7407 -32.8706 15.4 -1 USNO-B1 99.99 16.18 99.99
121.7417 -32.8695 16.2 -1 USNO-B1 20.37 18.23 19.18
121.7402 -32.8679 10.9 -1 USNO-B1 20.20 19.04 19.56
121.7365 -32.8651 10.5 -1 USNO-B1 19.41 18.59 18.96
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7190 -32.8846 7.7 -1 USNO-B1 19.43 17.89 18.57
The closest star is 7.68" away.
List UVOT sources within 10" of the XRT position:
There are 37551.301 counts in the bkg source region of 5480.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.852 counts/pixel (5-sig UL in 4" is 19.42 mag) for 1061284_g339
There are 1399.4375 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 7.032 counts/pixel for 1061284_g339
There are 6429.5317 counts in the xrt_bkg source region of 940.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.840 counts/pixel (5-sig UL in 4" is 19.42 mag) for 1061284_g339
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.97, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1061284_648744710_210724d11h09m51s171336usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(121.7195,-32.8811,45")
fk5;-circle(121.721877312607,-32.8905851430516,6")
fk5;-circle(121.718950638939,-32.8822002019304,6")
fk5;-circle(121.713128556151,-32.8857264420312,6")
fk5;-circle(121.726025523519,-32.8824185580717,6")
fk5;-circle(121.709291280083,-32.8908010143936,6")
fk5;-circle(121.723010883221,-32.8767106909261,6")
fk5;-circle(121.713795226419,-32.8771839252784,6")
fk5;-circle(121.707861286754,-32.8756985770937,6")
fk5;-circle(121.726701085372,-32.8690212767548,6")
Region file: 1061284_648744710_210724d11h09m51s171336usUT_xrt.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(121.72117,-32.88569,8")
Region file: 1061284_648744710_210724d11h09m51s171336usUT_xrt_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(121.72117,-32.88569,25")
fk5;-circle(121.72117,-32.88569,15")
fk5;-circle(121.721877312607,-32.8905851430516,6")
fk5;-circle(121.718950638939,-32.8822002019304,6")
fk5;-circle(121.713128556151,-32.8857264420312,6")
fk5;-circle(121.726025523519,-32.8824185580717,6")
image paragraph message for exposure 2 of trigger 1061284
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210723 (Swift/BAT trigger 1061284) at 14:46:10 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
311 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the
XRT error circle. Because of the density of catalogued stars, further analysis
is required to report an upper limit for any afterglow in the sub-image. The
coverage of the XRT error circle by the 8'x8' region for the list of sources
generated on-board is uncertain because the large number of sources filled the
available telemetry. Because of the density of catalogued stars, further
analysis is required to report an upper limit for any afterglow in the region.
No correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 1061284 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210724d11h09m57s339213usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061284
-expid=648744710 -meonly -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1061284/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 648744710.31286 or about 2021:204:14:51:45 UT
Found 2785 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 45% of the srclist region. Found 186 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 36 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 30 source(s) in Genie image catalog. Found 4 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.97 mag. Found 470 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
43% of the Genie image region.
Genie image analysis:
Found 37551.3 counts in the large background region of 5480.0 pixels or a rate
of 6.852 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.27 mag. for a
4-arcsec aperture.
Found 1399.4 counts in the XRT position region of 199.0 pixels or a rate of
7.032 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.153 +/- 0.164 (1-sigma) cps or
20.22 mag and a range from 19.43 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.646 cps or 18.66 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.44 mag. The closest
srclist source has ra= 121.7190 dec= -32.8821 mag=17.92 sep=14.48". The closest
Genie source has ra= 121.7190 dec= -32.8822 mag=17.51 sep=14.24".
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
648744710 311 U srclist found no candidates.
648744710 311 U image found no candidates.
List afterglow candidates for other finding charts.
648744497 98 WHITE srclist found no candidates.
648744497 98 WHITE image found no candidates.
648745265 866 WHITE srclist found no candidates.
648745265 866 WHITE image found no candidates.
------- Tokens for Quick GCN -------